Journal
NEW JOURNAL OF CHEMISTRY
Volume 36, Issue 12, Pages 2514-2519Publisher
ROYAL SOC CHEMISTRY
DOI: 10.1039/c2nj40645d
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- Institute for Advanced Studies in Basic Sciences
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Amorphous manganese oxide-coated montmorillonite hybrids were synthesized and characterized by SEM, N-2 adsorption-desorption isotherms, TEM, EDX, XRD, FTIR and AAS. The compounds show efficient water oxidation activity (0.22 mmol O-2/mol Mn.s) with a turnover number of similar to 3 in 1 h in the presence of cerium(IV) ammonium nitrate as a non-oxo transfer oxidant. Effects of manganese oxide content, calcination temperature, concentration of oxidant on the water oxidation activity of the compounds were studied and compared with other manganese oxides. The O-2 evolution was analyzed by Yagi's kinetic model. The activation energy parameter, leaking of manganese ions into solution, and a cooperatively proposed mechanism for manganese oxide toward water oxidation were also reported for the hybrid.
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